The main function of an electric motor is to convert electrical energy into mechanical energy to drive various mechanical devices, while a generator converts other forms of energy, such as chemical energy, water energy, or wind energy, into mechanical energy first, and then converts mechanical energy into electrical energy.

The structure of the motor is relatively lightweight and simple, consisting of only one motor and corresponding transmission devices, which can complete complex work tasks. Its small size makes it easy to install in various devices, such as car engines, household appliances, machine tools, etc., as a driving force.